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Keywords: borehole
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Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-w08-01
...-parametric geoscientific investigations on the Killari borehole basalts, located in the southern part of the Deccan Volcanic Province, indicate that the presence of chlorophaeite and opaque minerals in the rock groundmass significantly contributes to this anomalous behavior. This finding is pertinent...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4090706
... In this paper we present a mathematical formulation for the borehole fluid multipole wavefield due to a unipole excitation. Unipole source and multipole receiver array are axially offset from each other and located on the rim of an eccentered elastic tool submersed in a fluid-filled borehole...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4091753
... Borehole acoustic-wave reflection imaging technology is now widely used in high-angle and/or horizontal wells to delineate geological features in the formation surrounding the well. We develop an application that combines the fourcomponent dipole shear-wave azimuthal imaging with a coordinate...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4095575
... Tool eccentricity is a common occurrence in complex borehole environments, such as large boreholes, highly deviated wells or horizontal wells. Therefore, we analyze the model of acoustic logging with an eccentric tool in a dual-cylindrical coordinate system centered on the tool and borehole...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 26–29, 2024
Paper Number: SEG-2024-4100380
... borehole before and after the seawater/CO2 fluid injection and determine the injected fluid’s location after the injection. The results of the inversion of the post-injection survey data clearly showed the location of the conductive zone associated with the injected seawater/CO2 in the reservoir...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 27–September 1, 2023
Paper Number: SEG-2023-3912932
... We conducted geophysical explorations in the Kijiyama geothermal field to determine subsurface structures using DTS and DAS measurements in a hot geothermal borehole. The temperature reached 288ºC at the borehole depth of 2 km. We determined the 3D Vp structures that satisfied the geological...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 27–September 1, 2023
Paper Number: SEG-2023-3905250
... from the borehole. upstream oil & gas drilling operation geology directional drilling reservoir boundary complex reservoir log analysis fracture well logging china government imaging geological subdiscipline geologist asia government hydraulic fracturing reservoir...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 27–September 1, 2023
Paper Number: SEG-2023-3909724
... measured in shallow boreholes. The method relies on the parametric inversion of magnetic data from multiple boreholes and uses line segments to represent unknown metallic pipes. We have tested the validity of the approach using synthetic datasets and applied it in an on-going infrastructure project. Both...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 27–September 1, 2023
Paper Number: SEG-2023-3908992
... The current research on time-domain electromagnetic detection methods for well boreholes is proposed based on the magnetic source measurement mode. Compared with magnetic sources, the electrical source measurement mode, both electrical and magnetic signal acquisition can be used. Its measurement...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3750434
... gamma-ray counts, the capture gamma-ray count ratio and inelastic gamma-ray count ratio from different detectors, a new characterization of the fast neutron cross-section can achieve self-compensation under borehole gas-bearing and the complex completion. Note: This paper was accepted...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3727331
... borehole upstream oil & gas log analysis resistivity american association artificial intelligence boundary ml-based deconvolution method exploration geophysicist applied geoscience annual logging symposium ML-based Deconvolution Method for High Resolution Fast Inversion of Induction Log...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3751011
... Borehole guided waves (tube waves) are dominant acoustic waves in borehole seismic data. Tube waves can be exploited to characterize the hydraulic properties of fractures intersecting the borehole. Several theoretical tube-wave generation models have been proposed earlier in order to link...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3751189
... Heterogeneous elastic property variation in the rock formation surrounding a borehole can cause wave scattering in the borehole acoustic waveforms, which in turn can be used to characterize the formation heterogeneities. Considering the elastic wave scattering caused by the variation of the near...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3751596
... In this paper we revisit a very specialized borehole acoustic computational method to compute the fundamental wave types (head waves and borehole guided modes) that make up the full waveform. This opposed to the Real Axis Integration (RAI) method which only yields the sum of these constituents...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-3751949
... In a research borehole near Dallas, Texas, a 235’ (71.62m) thick succession containing the positive carbon isotope (δC13) excursion associated with the Cenomanian/Turonian Boundary Event (CTBE) is present. More remarkably, based on nearby ammonite work by Kennedy (1988), the portion of the CTBE...
Proceedings Papers

Paper presented at the SEG/AAPG International Meeting for Applied Geoscience & Energy, August 28–September 1, 2022
Paper Number: SEG-2022-w6-01
... require a comprehensive understanding of ground conditions for design. upstream oil & gas society borehole refraction microtremor survey multidisciplinary site investigation american association constraint reservoir characterization representation remi investigation exploration...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584448
... unconstrained inversions can lead to ambiguous results. A constrained inversion using borehole lithologies and ground-based geophysics data as gradient reference and parameter reference constraints provides a more refined model, enabling higher confidence in the interpretation. The purpose of this study...

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